Temperature-alarm.



W. C. ELSAGER. TEMBERATURE ALARM. APPLICATION 'FILED 111111.29, 1911. 1 ,042,539. y Patented Oct. 29,1912. l 2 sums-SHEET 1;

W. C. ELSAGBR.` TEMPERATURE ALARM. APPLICATION FILED 5116.29, 1911.

f Patented oct. 29, 1912.

v2 SHEETS-SHEET z.

@M4/woo@ Gimme/1f I alarmsand the object of the inventwn isto A-"\ -\provide analarm in which the expansion of f operate to automatically sound an alarm when the device is affected by e predeter drops toa point which would be liableo p With these and other objects in View the temperature,`\"the wiring being arranged' in mi. c. atesora, or enana names, memoire.

@armurerie-annum.

peeeation of Letters Patent. -\Paiex1'med i. 29, 1912.

'`s Applicationk led August 28, 1911. Serial Eo. Gdid.

Thisinvention relates to' temperature 454m expansib'le clement such as mercury will `nined temperature. l Another object of the invention is to pro- 20 vide an improved and simple form of temperature device in which a circuit will be closed by the expansion or. contraction of a body of mercury located within atubc, so as .to sound an alarm in case the temperature injure or destroy fruits or berries or in case the temperature rises to a point to sound an alarm in case of fire or for the purpose of indicating hot boxes upon machineryL` invention consists of certain other combinations `and arrangements of parts, as will be hereinafter "more fully described' and claimed, .itbeing a stilhfurther obj ect of the 35 invention to provide a device which will not be likely to get out of working order.

In the drawingsz-Figure ll is a front ele-` vation of my improved alarm device adapted to opera :e a signal upon a reduction in diagram. Fig,-,2 is a longitudinal sectional View but showing the device arranged for use in operating\ \a\n alarm due to a rise in temperature and especially for use in connection with jourrilkboxes. Fig. 3 isa top plan View of the invention. Fig.4 is a sectional view taken onithe line 4-4 Fig. 1. Fig. 5 is a detail view-of one of the ll supporting members.

Referring to the drawings in detail, there is shown a base 10 in Fig. 1 adapted to support a vertical upright i411 forming the back-- of the instrument, said'upright being' sup ported in brackets 12 secured to the base and 5 5 adapted to retain a mercurial bulb 13 thereon through theinediuin of supporting rings 14 engaged tlierearound,f-yvhile the tube or neck 'portion 15 of the bulb into which a bodyof mercury'is placed is also retained in position by theringajl which vserve to support the bulb spaced from the upright and permit the access ,ci air to the full area of the tube and bulb. Batteries orlcells x17j are also mounted. upon the base 'lfbeingfretained thereon at opposite sideslo the-upright by 'means of stationary bracketyin'embers 18 and slidable bracket :members faof angular form, the members 19 being eidapted to be clamped in position'by a'hpmb screw 20 engaged through a slot @lyinhe bracket member 19 in each instanceth serving to rigidly hold the cells 1n position."

movable rod or plunger '22 preferably coi'istru'cted` of wood or aluminum looee lits within thebfupper end of .the nec which is slightlj'rediiced in size at its upper end to serve aaa i 'ide 'to insure proper-eier# tical movement o1 the rod but' tnot tofriction its movement and said rod 1s urtie'rfre# tained in a vertical position by guide eyes 23 which are secured to the upright V321 andwhich slidably receive the said rod. v The upright 11 is graduated as shownatV 24 t6;- aeeord with the lower end of the rod andthe point at which it iioats u on the top oft-lie fluid Within the neck or tu e 15 so asti) permit proper adjustmentof the device tof'oper7- ate at a predetermined temperature. 'ifior-A our to `-acconiplish this purpose, a. Contact* bar 25 is pivotetl in a horizontal position to the upper Aend of the plunger, and projects toward opposite sides thereof while adjacent to the end portion ofthe Contact bar 25 the upright 11 is;` graduated. as shown at 26 to regulate the temperature at which the device will operate with respect to the indications upon the graduations :it-s2@ by the height of the iiuid Wit-hin the tube Vertical slots 27 are provided in the uprights 11 upon opposite sides of the plunger 22 and movable contact plugs 28 are mounted therein, said plugs comprising a terminal head 29'wliich are connected by the conductor wires 30 tlc opposite poles of the cells if( and, are provided with I threaded shank ortions 31 to'-wliich the plugs 28 .in the mi of bindingnult's are *secured and adapted to\engege the outer face" of the upright'fto hold the plugs at any predetermined positionand contact by thecrossbar 25 and thereby close the circuit ltlnrougli the con--A leading from the opposite pole of thecells to an alarm bell or device Guide rods 34 are also mounted upon the upright upon opposite sides of the plunger 22 inwardly of the slots 27 and similarly disposed in vertical positions spaced apart in parallel relation so asto retain the plunger and its contact bar from'lateral movement or rotation While a cap 35, preferably of glass or other transparent lmaterial is titted over the upper end of the upright to protect the operating parts and be supported upon lugs 36 projecting from the sides o1 the upright, the

4cap extending down sulliciently far to prevent the entrance of rain or the like therebeneath to interfere With the operation of the mechanism.

`When the device is in use for notifying and operating a si nal at a decrease in temperature, the cross 'lar 525 is positioned above the contact plugs or lugs Q8 and When it is desired to use the device to indicate a rise or increase in temperature, the cross bar is positioned below said plugs and similarly regulated.

In order to permit the use of the device" in connection with journal boxes or the like to indicate a hot box, a screw threaded plug 37 may be employed and threaded into an aperture 38 in the base l() to support the bulb or reservoir 13 upon its upperconcaved end 39 Without removing the supporting ring 14. This plug is constructed of metal so as to rest upon the boxing and to convey the heat thereof to the expansible lluid and operate the signal in the same manner as it the liuid were expanded by heat in case of" tire. f

rlhe device is simple in construction, ellicient in operation and economical to manufacture. It Will also be seen that by reason of .the pivotal connection of the cross bar 25 with the upper end of the plunger 22, positive closing of the circuit is accomplished even though the plugs or contact members 28 may not be in horizontal alinement,`.which action would not take place it the cross bar were rigid.

l. In a temperature alarnn a vertical upright, a vessel supported by said upright and adapted to contain an expansible tluid, a movable contact member operated thereby, said upright being provided with a pair of vertical slots spaced apart in parallel relation, contact plugs adjustable vertically in said slots, an electrical circuit, an alarm device in the circuit, said' plugs forming terminals o't said electric circuit, said contact member being adapted to engage vvith said adjustable contact plugs to close the circuit therethrough and guide rods carried by the upright and beneath which said movable contact member operates.

2. ln an alarm device, a base, an upright mounted thereon, means for holding said upright upon the base, said base having a threaded opening beneath the upright, batteries mounted upon the base, a reservoir having an upwardly extending neck portion ot' reduced diameter, said reservoir and neck portion being adapted to contain a fluid for contraction and expansion, a series of rings retaining said reservoir and neck portion in position, a plunger movable in the upper portion ot' the neck and carrying a contact member inthe form of a cross arm,

graduations arranged adjacent the lower end of the plunger and adjacent each end of the cross arm, guiding means for the plunger, contact members capable of adjustment toward and away from the cross arm, an electrical circuit including an alarm device and -a source of electrical energy adapted to be closed through the movable cross arm and adjustable members and a heat conducting plug threaded in the opening in the base in contact with the reservoir.

3. In an alarm device, a base, an upright mounted thereon, means for holding said upright upon the base, batteries mounted upon the base, a reservoir having an upwardly extending neck portion of reduced diameter, said reservoir and neck portion being adapted to contain a lluidl for contraction and expansion, a series of rings retaining said reservoir and neck portion in position, a plunge movable in the upper portion of the neck and carrying a contact member in the form of a' cross arm, graduations arranged adjacent the lower end of the plunger and adjacent each end of the cross arm, means to prevent lateral movement of the plunger and cross arm, contact members capable of adjustment above and below the cross arm and an electrical circuit including an alarm device and a source of electrical energy adapted to be closed through the movable cross arm and adjustable mem'- bers. v

ln testimony whereof, I allix my signature, in presence of two Witnesses. v

, WILLAVM C. ELSACER Witnesses l Y ROBERT W. GIBSON, C. W. PLANT. 

